Methods, systems, and devices for wireless communication are described. Sidelink user equipment (UE) may perform a sidelink beam management procedure in accordance with a sidelink beam management configuration. A first UE may receive sidelink reference signals via a first set of time-frequency resources. As part of the sidelink beam management procedure, the first UE may transmit a sidelink message including feedback and beam management information (e.g., measurements) corresponding to the sidelink reference signals, which a second UE may use for the sidelink beam management procedure. In addition, the first UE may receive a set of demodulation reference signals (DMRSs) associated with a sidelink channel via a second set of time-frequency resources which may be non-overlapping, or at least partially overlapping, with the first set of time-frequency resources. The first UE may use the sidelink reference signals, the DMRSs, or both for sidelink beam management.
Legal claims defining the scope of protection, as filed with the USPTO.
one or more memories storing processor-executable code; and receive, from a second UE via a first set of time-frequency resources associated with a sidelink beam management configuration, a plurality of sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration; receive, from the second UE via a second set of time-frequency resources, a plurality of demodulation reference signals associated with a plurality of sidelink channels, wherein the second set of time-frequency resources is non-overlapping with the first set of time-frequency resources, and wherein the plurality of sidelink reference signals and the plurality of sidelink channels associated with the plurality of demodulation reference signals are time division multiplexed in a slot; and transmit, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the plurality of sidelink reference signals and the plurality of demodulation reference signals, the sidelink message comprising feedback for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both, wherein the sidelink message indicates beam management information corresponding to the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both based at least in part on the sidelink beam management configuration. one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to: . A first user equipment (UE) for wireless communications, comprising:
claim 1 perform the sidelink beam management procedure using the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both. . The first UE of, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:
claim 1 perform a received power measurement procedure for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or a combination thereof, wherein the sidelink message indicates one or more received power measurements associated with the received power measurement procedure. . The first UE of, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:
claim 1 . The first UE of, wherein the feedback indicates resources associated with a reference signal measurement that exceeds a measurement threshold.
claim 1 perform a received power measurement procedure for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or a combination thereof; and initiate a beam failure recovery procedure based at least in part on a beam failure that is triggered based at least in part on one or more reference signal measurements and a measurement threshold. . The first UE of, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:
claim 1 decode the plurality of sidelink channels associated with the plurality of demodulation reference signals; and initiate a beam failure recovery procedure based at least in part on a beam failure that is triggered based at least in part on the decoding of the plurality of sidelink channels and an error threshold. . The first UE of, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:
claim 1 . The first UE of, wherein the plurality of sidelink reference signals and the plurality of sidelink channels associated with the plurality of demodulation reference signals are time division multiplexed in a slot such that the first UE receives the plurality of sidelink reference signals and the plurality of demodulation reference signals.
claim 1 . The first UE of, wherein the plurality of sidelink reference signals are received semi-persistently, aperiodically, or according to a periodicity based at least in part on the sidelink beam management configuration.
one or more memories storing processor-executable code; and the sidelink beam management procedure is between the first UE and a second UE in accordance with the sidelink beam management configuration; and the subset of the first set of time-frequency resources is non-overlapping with a second set of time-frequency resources; a subset of a plurality of sidelink reference signals for a sidelink beam management procedure via a subset of a first set of time-frequency resources associated with a sidelink beam management configuration of the first UE, wherein: a first subset of a plurality of demodulation reference signals associated with a plurality of sidelink channels via a first subset of the second set of time-frequency resources, wherein the first subset of the second set of time-frequency resources is non-overlapping with the first set of time-frequency resources; and a second subset of the plurality of demodulation reference signals via a second subset of the second set of time-frequency resources, wherein the second subset of the second set of time-frequency resources overlaps with the first set of time-frequency resources, and wherein at least one time-frequency resource of the first set of time-frequency resources is replaced with at least one sidelink channel of the plurality of sidelink channels associated with the plurality of demodulation reference signals; wherein the subset of the plurality of sidelink reference signals and the plurality of sidelink channels associated with the plurality of demodulation reference signals are time division multiplexed in a slot; and transmit, using a plurality of transmit beams of the first UE: receive, from the second UE, a sidelink message in response to the plurality of sidelink reference signals and the plurality of demodulation reference signals, the sidelink message comprising feedback for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both, wherein the sidelink message indicates beam management information corresponding to the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both based at least in part on the sidelink beam management configuration. one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to: . A first user equipment (UE) for wireless communications, comprising:
claim 9 . The first UE of, wherein the sidelink beam management procedure is based at least in part on the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both.
claim 9 . The first UE of, wherein the feedback indicates a plurality of received power measurements associated with the plurality of transmit beams based at least in part on the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both.
claim 9 . The first UE of, wherein the feedback indicates resources associated with at least one transmit beam of the plurality of transmit beams based at least in part on the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both.
claim 9 . The first UE of, wherein the subset of the plurality of sidelink reference signals and the plurality of sidelink channels associated with the plurality of demodulation reference signals are time division multiplexed in a slot such that the first UE transmits the subset of the plurality of sidelink reference signals and the plurality of demodulation reference signals.
claim 9 . The first UE of, wherein the at least one time-frequency resource of the first set of time-frequency resources is replaced with the at least one sidelink channel of the plurality of sidelink channels associated with the plurality of demodulation reference signals based at least in part on the at least one sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the at least one time-frequency resource.
claim 9 . The first UE of, wherein the plurality of sidelink reference signals are transmitted semi-persistently, aperiodically, or according to a periodicity based at least in part on the sidelink beam management configuration.
receiving, from a second UE via a first set of time-frequency resources associated with a sidelink beam management configuration, a plurality of sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration; receiving, from the second UE via a second set of time-frequency resources, a plurality of demodulation reference signals associated with a plurality of sidelink channels, wherein the second set of time-frequency resources is non-overlapping with the first set of time-frequency resources, and wherein the plurality of sidelink reference signals and the plurality of sidelink channels associated with the plurality of demodulation reference signals are time division multiplexed in a slot; and transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the plurality of sidelink reference signals and the plurality of demodulation reference signals, the sidelink message comprising feedback for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both, wherein the sidelink message indicates beam management information corresponding to the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both based at least in part on the sidelink beam management configuration. . A method for wireless communications at a first user equipment (UE), comprising:
claim 16 performing the sidelink beam management procedure using the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both. . The method of, further comprising:
claim 16 performing a received power measurement procedure for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or a combination thereof, wherein the sidelink message indicates one or more received power measurements associated with the received power measurement procedure. . The method of, further comprising:
the sidelink beam management procedure is between the first UE and a second UE in accordance with the sidelink beam management configuration; and the subset of the first set of time-frequency resources is non-overlapping with a second set of time-frequency resources; a subset of a plurality of sidelink reference signals for a sidelink beam management procedure via a subset of a first set of time-frequency resources associated with a sidelink beam management configuration of the first UE, wherein: a first subset of a plurality of demodulation reference signals associated with a plurality of sidelink channels via a first subset of the second set of time-frequency resources, wherein the first subset of the second set of time-frequency resources is non-overlapping with the first set of time-frequency resources; and a second subset of the plurality of demodulation reference signals via a second subset of the second set of time-frequency resources, wherein the second subset of the second set of time-frequency resources overlaps with the first set of time-frequency resources, and wherein at least one time-frequency resource of the first set of time-frequency resources is replaced with at least one sidelink channel of the plurality of sidelink channels associated with the plurality of demodulation reference signals; wherein the subset of the plurality of sidelink reference signals and the plurality of sidelink channels associated with the plurality of demodulation reference signals are time division multiplexed in a slot; and transmitting, using a plurality of transmit beams of the first UE: receiving, from the second UE, a sidelink message in response to the plurality of sidelink reference signals and the plurality of demodulation reference signals, the sidelink message comprising feedback for the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both, wherein the sidelink message indicates beam management information corresponding to the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both based at least in part on the sidelink beam management configuration. . A method for wireless communications at a first user equipment (UE), comprising:
claim 19 . The method of, wherein the sidelink beam management procedure is based at least in part on the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both.
claim 19 . The method of, wherein the feedback indicates a plurality of received power measurements associated with the plurality of transmit beams based at least in part on the plurality of sidelink reference signals, the plurality of demodulation reference signals, or both.
Complete technical specification and implementation details from the patent document.
The present Application for Patent claims the benefit of U.S. Provisional Patent Application No. 63/493,984 by TAKEDA et al., entitled “SIDELINK BEAM MANAGEMENT BASED ON REFERENCE SIGNAL AND SIDELINK CHANNEL TRANSMISSIONS,” filed Apr. 3, 2023, assigned to the assignee hereof, and expressly incorporated by reference herein.
The following relates to wireless communication, including sidelink beam management based on reference signal and sidelink channel transmissions.
Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE).
The described techniques relate to improved methods, systems, devices, and apparatuses that support sidelink beam management based on reference signal and sidelink channel transmissions. For example, the described techniques enable sidelink beam management based on sidelink reference signal and sidelink channel transmissions. In some examples of sidelink communications, a first user equipment (UE) may receive a set of multiple sidelink reference signals from a second UE, where the UEs may use the sidelink reference signals for a sidelink beam management procedure. The second UE may transmit the sidelink reference signals via a first set of time-frequency resources associated with a sidelink beam management configuration. In some examples, the first UE may transmit a sidelink message in response to receiving the sidelink reference signals. The sidelink message may include feedback for the sidelink reference signals, and may indicate beam management information corresponding to the sidelink reference signals based on the sidelink beam management configuration. That is, the first UE may report feedback and beam management information (e.g., beam measurements) that the second UE may use to perform the sidelink beam management procedure.
In some examples, the second UE may transmit a set of multiple demodulation reference signals (DMRSs) associated with a sidelink channel via a second set of time-frequency resources. If the second set of time-frequency resources is non-overlapping with the first set of time-frequency resources, then the UEs may perform a beam management procedure based on the sidelink reference signals and the first UE may receive and decode sidelink data in accordance with the DMRSs. Alternatively, if the second set of time-frequency resources partially or fully overlaps with the first set of time-frequency resources, and if the sidelink channel is associated with a same transmit beam as the sidelink reference signal associated with a time-frequency resource of the first set of time-frequency resources, the first UE may replace the time-frequency resource with the sidelink channel associated with the DMRSs.
A method for wireless communications at a first UE is described. The method may include receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration and transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
A first UE for wireless communications is described. The first UE may include one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to receive, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration and transmit, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
Another first UE for wireless communications is described. The first UE may include means for receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration and means for transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
A non-transitory computer-readable medium storing code for wireless communications at a first UE is described. The code may include instructions executable by one or more processors to receive, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration and transmit, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the second UE via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources may be non-overlapping with the set of time-frequency resources.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for performing the sidelink beam management procedure using the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for performing a received power measurement procedure for the set of multiple sidelink reference signals, the set of multiple DMRSs, or a combination thereof, where the sidelink message indicates one or more received power measurements associated with the received power measurement procedure.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the feedback indicates resources associated with a reference signal measurement that exceeds a measurement threshold.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for performing a received power measurement procedure for the set of multiple sidelink reference signals, the set of multiple DMRSs, or a combination thereof and initiating a beam failure recovery (BFR) procedure based on a beam failure that may be triggered based on one or more reference signal measurements and a measurement threshold.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for decoding a set of multiple sidelink channels associated with the set of multiple DMRSs and initiating a BFR procedure based on a beam failure that may be triggered based on the decoding of the set of multiple sidelink channels and an error threshold.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the set of multiple sidelink reference signals and a set of multiple sidelink channels associated with the set of multiple DMRSs may be time division multiplexed (TDMed) in a slot.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the second UE via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources at least partially overlaps the set of time-frequency resources.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, receiving the set of multiple DMRSs may include operations, features, means, or instructions for receiving one or more DMRSs of the set of multiple DMRSs via a subset of the second set of time-frequency resources, where the subset overlaps the set of time-frequency resources.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, a time-frequency resource of the set of time-frequency resources may be replaced with the sidelink channel associated with the set of multiple DMRSs based on the sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the time-frequency resource.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the set of multiple sidelink reference signals may be received semi-persistently, aperiodically, or according to a periodicity based on the sidelink beam management configuration.
A method for wireless communications at a first UE is described. The method may include transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration and receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
A first UE for wireless communications is described. The first UE may include one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to transmit, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration and receive, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
Another first UE for wireless communications is described. The first UE may include means for transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration and means for receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
A non-transitory computer-readable medium storing code for wireless communications at a first UE is described. The code may include instructions executable by one or more processors to transmit, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration and receive, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, using the set of multiple transmit beams and via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources may be non-overlapping with the set of time-frequency resources.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the sidelink beam management procedure may be based on the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the feedback indicates a set of multiple received power measurements associated with the set of multiple transmit beams based on the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the feedback indicates resources associated with at least one transmit beam of the set of multiple transmit beams based on the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the set of multiple sidelink reference signals and a set of multiple sidelink channels associated with the set of multiple DMRSs may be TDMed in a slot.
Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, using the set of multiple transmit beams and via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources at least partially overlap the set of time-frequency resources.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, transmitting the set of multiple DMRSs may include operations, features, means, or instructions for transmitting one or more DMRSs of the set of multiple DMRSs via a subset of the second set of time-frequency resources, where the subset overlaps the set of time-frequency resources.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, a time-frequency resource of the set of time-frequency resources may be replaced with the sidelink channel associated with the set of multiple DMRSs based on the sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the time-frequency resource.
In some examples of the method, UEs, and non-transitory computer-readable medium described herein, the set of multiple sidelink reference signals may be transmitted semi-persistently, aperiodically, or according to a periodicity based on the sidelink beam management configuration.
A user equipment (UE) and a network entity (e.g., a base station) may utilize beam management procedures to maintain or improve signaling quality. For example, the network entity may transmit reference signals to the UE using multiple transmit beams, the UE may receive and measure the reference signals, and the UE may transmit feedback to the network entity. The network entity may use the feedback as part of a beam management procedure. For example, the network entity may select transmit and receive beams to use for communications with the UE based on the feedback. UEs performing sidelink communications may benefit from performing sidelink beam management procedures. However, such sidelink beam management procedures may rely on sidelink reference signals that may increase signaling overhead for the UEs (e.g., if there is data to communicate above a threshold amount of data). Alternatively, a UE may transmit sidelink channels (e.g., physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH)) with demodulation reference signals (DMRSs) using multiple transmit beams, and another UE may receive and measure the DMRSs to perform sidelink beam management. However, such techniques may be useful to limited scenarios when the sidelink UEs have sufficient data to communicate, which may be infrequent.
The techniques described herein enable sidelink beam management based on sidelink reference signal and sidelink channel transmissions. In some examples, a receive UE may receive a set of multiple sidelink reference signals (e.g., synchronization signal block (SSB) or SSB-like signals) from a transmit UE. The transmit UE may transmit the sidelink reference signals via a first set of time-frequency resources associated with a sidelink beam management configuration. In addition, the transmit UE and the receive UE may use the sidelink reference signals for a sidelink beam management procedure in accordance with the sidelink beam management configuration. In some examples, the receive UE may transmit a sidelink message in response to receiving the sidelink reference signals. The sidelink message may include feedback for the sidelink reference signals, and may indicate beam management information corresponding to the sidelink reference signals based on the sidelink beam management configuration. That is, the receive UE may report feedback and beam management information (e.g., beam measurements) that the transmit UE may use to perform the sidelink beam management procedure.
Additionally, the transmit UE may transmit a set of multiple DMRSs associated with a sidelink channel via a second set of time-frequency resources. If the second set of time-frequency resources is non-overlapping with the first set of time-frequency resources, then the UEs may perform a beam management procedure based on the sidelink reference signals and the receive UE may receive and decode sidelink data in accordance with the DMRSs. Alternatively, if the second set of time-frequency resources partially or fully overlaps with the first set of time-frequency resources, and if the sidelink channel is associated with a same transmit beam as the sidelink reference signal associated with a time-frequency resource of the first set of time-frequency resources, the receive UE may replace the time-frequency resource with the sidelink channel associated with the DMRSs. In this way, the receive UE may receive one or more DMRSs.
Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are then described in the context of transmission schemes, resource configurations, and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to sidelink beam management based on reference signal and sidelink channel transmissions.
1 FIG. 100 100 105 115 130 100 shows an example of a wireless communications systemthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The wireless communications systemmay include one or more network entities, one or more UEs, and a core network. In some examples, the wireless communications systemmay be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
105 100 105 105 115 125 105 110 115 105 125 110 105 115 The network entitiesmay be dispersed throughout a geographic area to form the wireless communications systemand may include devices in different forms or having different capabilities. In various examples, a network entitymay be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entitiesand UEsmay wirelessly communicate via one or more communication links(e.g., a radio frequency (RF) access link). For example, a network entitymay support a coverage area(e.g., a geographic coverage area) over which the UEsand the network entitymay establish one or more communication links. The coverage areamay be an example of a geographic area over which a network entityand a UEmay support the communication of signals according to one or more radio access technologies (RATs).
115 110 100 115 115 115 115 115 105 1 FIG. 1 FIG. The UEsmay be dispersed throughout a coverage areaof the wireless communications system, and each UEmay be stationary, or mobile, or both at different times. The UEsmay be devices in different forms or having different capabilities. Some example UEsare illustrated in. The UEsdescribed herein may be capable of supporting communications with various types of devices, such as other UEsor network entities, as shown in.
100 105 115 115 105 115 105 115 115 105 105 115 105 115 105 115 105 As described herein, a node of the wireless communications system, which may be referred to as a network node, or a wireless node, may be a network entity(e.g., any network entity described herein), a UE(e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE. As another example, a node may be a network entity. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE, the second node may be a network entity, and the third node may be a UE. In another aspect of this example, the first node may be a UE, the second node may be a network entity, and the third node may be a network entity. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE, network entity, apparatus, device, computing system, or the like may include disclosure of the UE, network entity, apparatus, device, computing system, or the like being a node. For example, disclosure that a UEis configured to receive information from a network entityalso discloses that a first node is configured to receive information from a second node.
105 130 105 130 120 105 120 105 130 105 162 168 120 162 168 115 130 155 In some examples, network entitiesmay communicate with the core network, or with one another, or both. For example, network entitiesmay communicate with the core networkvia one or more backhaul communication links(e.g., in accordance with an S1, N2, N3, or other interface protocol). In some examples, network entitiesmay communicate with one another via a backhaul communication link(e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities) or indirectly (e.g., via a core network). In some examples, network entitiesmay communicate with one another via a midhaul communication link(e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link(e.g., in accordance with a fronthaul interface protocol), or any combination thereof. The backhaul communication links, midhaul communication links, or fronthaul communication linksmay be or include one or more wired links (e.g., an electrical link, an optical fiber link), one or more wireless links (e.g., a radio link, a wireless optical link), among other examples or various combinations thereof. A UEmay communicate with the core networkvia a communication link.
105 140 105 140 105 140 One or more of the network entitiesdescribed herein may include or may be referred to as a base station(e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (cNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB), a 5G NB, a next-generation eNB (ng-eNB), a Home NodeB, a Home eNodeB, or other suitable terminology). In some examples, a network entity(e.g., a base station) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity(e.g., a single RAN node, such as a base station).
105 105 105 160 165 170 175 180 170 105 105 105 In some examples, a network entitymay be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture), which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, a network entitymay include one or more of a central unit (CU), a distributed unit (DU), a radio unit (RU), a RAN Intelligent Controller (RIC)(e.g., a Near-Real Time RIC (Near-RT RIC), a Non-Real Time RIC (Non-RT RIC)), a Service Management and Orchestration (SMO)system, or any combination thereof. An RUmay also be referred to as a radio head, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmission reception point (TRP). One or more components of the network entitiesin a disaggregated RAN architecture may be co-located, or one or more components of the network entitiesmay be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entitiesof a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU), a virtual DU (VDU), a virtual RU (VRU)).
160 165 170 160 165 170 160 165 160 165 160 160 165 170 165 170 160 165 170 165 170 165 170 160 165 165 170 160 165 170 160 165 170 160 160 165 162 165 170 168 162 168 105 The split of functionality between a CU, a DU, and an RUis flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CUand a DUsuch that the CUmay support one or more layers of the protocol stack and the DUmay support one or more different layers of the protocol stack. In some examples, the CUmay host upper protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functionality and signaling (e.g., Radio Resource Control (RRC), service data adaption protocol (SDAP), Packet Data Convergence Protocol (PDCP)). The CUmay be connected to one or more DUsor RUs, and the one or more DUsor RUsmay host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DUand an RUsuch that the DUmay support one or more layers of the protocol stack and the RUmay support one or more different layers of the protocol stack. The DUmay support one or multiple different cells (e.g., via one or more RUs). In some cases, a functional split between a CUand a DU, or between a DUand an RUmay be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU). A CUmay be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CUmay be connected to one or more DUsvia a midhaul communication link(e.g., F1, F1-c, F1-u), and a DUmay be connected to one or more RUsvia a fronthaul communication link(e.g., open fronthaul (FH) interface). In some examples, a midhaul communication linkor a fronthaul communication linkmay be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entitiesthat are in communication via such communication links.
100 130 105 104 104 165 170 160 105 140 105 105 104 120 104 165 115 170 104 165 104 104 165 104 115 104 104 In wireless communications systems (e.g., wireless communications system), infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network). In some cases, in an IAB network, one or more network entities(e.g., IAB nodes) may be partially controlled by each other. One or more IAB nodesmay be referred to as a donor entity or an IAB donor. One or more DUsor one or more RUsmay be partially controlled by one or more CUsassociated with a donor network entity(e.g., a donor base station). The one or more donor network entities(e.g., IAB donors) may be in communication with one or more additional network entities(e.g., IAB nodes) via supported access and backhaul links (e.g., backhaul communication links). IAB nodesmay include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUsof a coupled IAB donor. An IAB-MT may include an independent set of antennas for relay of communications with UEs, or may share the same antennas (e.g., of an RU) of an IAB nodeused for access via the DUof the IAB node(e.g., referred to as virtual IAB-MT (vIAB-MT)). In some examples, the IAB nodesmay include DUsthat support communication links with additional entities (e.g., IAB nodes, UEs) within the relay chain or configuration of the access network (e.g., downstream). In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodesor components of IAB nodes) may be configured to operate according to the techniques described herein.
104 115 130 130 130 160 165 170 160 130 104 160 160 160 For instance, an access network (AN) or RAN may include communications between access nodes (e.g., an IAB donor), IAB nodes, and one or more UEs. The IAB donor may facilitate connection between the core networkand the AN (e.g., via a wired or wireless connection to the core network). That is, an IAB donor may refer to a RAN node with a wired or wireless connection to core network. The IAB donor may include a CUand at least one DU(e.g., and RU), in which case the CUmay communicate with the core networkvia an interface (e.g., a backhaul link). IAB donor and IAB nodesmay communicate via an F1 interface according to a protocol that defines signaling messages (e.g., an F1 AP protocol). Additionally, or alternatively, the CUmay communicate with the core network via an interface, which may be an example of a portion of backhaul link, and may communicate with other CUs(e.g., a CUassociated with an alternative IAB donor) via an Xn-C interface, which may be an example of a portion of a backhaul link.
104 115 165 104 104 104 104 104 104 104 104 165 104 104 115 An IAB nodemay refer to a RAN node that provides IAB functionality (e.g., access for UEs, wireless self-backhauling capabilities). A DUmay act as a distributed scheduling node towards child nodes associated with the IAB node, and the IAB-MT may act as a scheduled node towards parent nodes associated with the IAB node. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through one or more other IAB nodes). Additionally, or alternatively, an IAB nodemay also be referred to as a parent node or a child node to other IAB nodes, depending on the relay chain or configuration of the AN. Therefore, the IAB-MT entity of IAB nodesmay provide a Uu interface for a child IAB nodeto receive signaling from a parent IAB node, and the DU interface (e.g., DUs) may provide a Uu interface for a parent IAB nodeto signal to a child IAB nodeor UE.
104 160 120 130 104 165 115 104 115 160 104 104 115 165 104 104 104 165 104 165 104 For example, IAB nodemay be referred to as a parent node that supports communications for a child IAB node, or referred to as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CUwith a wired or wireless connection (e.g., a backhaul communication link) to the core networkand may act as parent node to IAB nodes. For example, the DUof IAB donor may relay transmissions to UEsthrough IAB nodes, or may directly signal transmissions to a UE, or both. The CUof IAB donor may signal communication link establishment via an F1 interface to IAB nodes, and the IAB nodesmay schedule transmissions (e.g., transmissions to the UEsrelayed from the IAB donor) through the DUs. That is, data may be relayed to and from IAB nodesvia signaling via an NR Uu interface to MT of the IAB node. Communications with IAB nodemay be scheduled by a DUof IAB donor and communications with IAB nodemay be scheduled by DUof IAB node.
115 105 140 104 165 160 170 175 180 In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, some operations described as being performed by a UEor a network entity(e.g., a base station) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes, DUs, CUs, RUs, RIC, SMO).
115 115 115 A UEmay include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UEmay also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UEmay include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
115 115 105 1 FIG. The UEsdescribed herein may be able to communicate with various types of devices, such as other UEsthat may sometimes act as relays as well as the network entitiesand the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in.
115 105 125 125 125 100 115 115 105 105 105 105 140 160 165 170 105 The UEsand the network entitiesmay wirelessly communicate with one another via one or more communication links(e.g., an access link) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links. For example, a carrier used for a communication linkmay include a portion of a RF spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications systemmay support communication with a UEusing carrier aggregation or multi-carrier operation. A UEmay be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entityand other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity. For example, the terms “transmitting,” “receiving,” or “communicating,” when referring to a network entity, may refer to any portion of a network entity(e.g., a base station, a CU, a DU, a RU) of a RAN communicating with another device (e.g., directly or via one or more other network entities).
115 115 In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN)) and may be identified according to a channel raster for discovery by the UEs. A carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEsvia the carrier, or the carrier may be operated in a non-standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different radio access technology).
125 100 105 115 115 105 The communication linksshown in the wireless communications systemmay include downlink transmissions (e.g., forward link transmissions) from a network entityto a UE, uplink transmissions (e.g., return link transmissions) from a UEto a network entity, or both, among other configurations of transmissions. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode).
100 100 105 115 100 105 115 115 A carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system. For example, the carrier bandwidth may be one of a set of bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz), or 100, 200, 400, or 800 MHz for frequency range 2 (FR2) and millimeter wave communications). Devices of the wireless communications system(e.g., the network entities, the UEs, or both) may have hardware configurations that support communications using a particular carrier bandwidth or may be configurable to support communications using one of a set of carrier bandwidths. In some examples, the wireless communications systemmay include network entitiesor UEsthat support concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UEmay be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
115 Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both), such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam), and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE.
105 115 s max f max f The time intervals for the network entitiesor the UEsmay be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T=1/(Δf·N) seconds, for which Δfmay represent a supported subcarrier spacing, and Nmay represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).
100 f Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
100 100 A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications systemand may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications systemmay be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).
115 115 115 115 Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs. For example, one or more of the UEsmay monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEsand UE-specific search space sets for sending control information to a specific UE.
105 140 170 110 110 110 105 110 105 100 105 110 In some examples, a network entity(e.g., a base station, an RU) may be movable and therefore provide communication coverage for a moving coverage area. In some examples, different coverage areasassociated with different technologies may overlap, but the different coverage areasmay be supported by the same network entity. In some other examples, the overlapping coverage areasassociated with different technologies may be supported by different network entities. The wireless communications systemmay include, for example, a heterogeneous network in which different types of the network entitiesprovide coverage for various coverage areasusing the same or different radio access technologies.
115 105 140 115 Some UEs, such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a network entity(e.g., a base station) without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that uses the information or presents the information to humans interacting with the application program. Some UEsmay be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
100 100 115 The wireless communications systemmay be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications systemmay be configured to support ultra-reliable low-latency communications (URLLC). The UEsmay be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
115 115 135 115 110 105 140 170 105 115 110 105 105 115 115 115 105 115 105 In some examples, a UEmay be configured to support communicating directly with other UEsvia a device-to-device (D2D) communication link(e.g., in accordance with a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEsof a group that are performing D2D communications may be within the coverage areaof a network entity(e.g., a base station, an RU), which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity. In some examples, one or more UEsof such a group may be outside the coverage areaof a network entityor may be otherwise unable to or not configured to receive transmissions from a network entity. In some examples, groups of the UEscommunicating via D2D communications may support a one-to-many (1:M) system in which each UEtransmits to each of the other UEsin the group. In some examples, a network entitymay facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEswithout an involvement of a network entity.
135 115 105 140 170 In some systems, a D2D communication linkmay be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs). In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities, base stations, RUs) using vehicle-to-network (V2N) communications, or with both.
130 130 115 105 140 130 150 150 The core networkmay provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core networkmay be an evolved packet core (EPC) or 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEsserved by the network entities(e.g., base stations) associated with the core network. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP servicesfor one or more network operators. The IP servicesmay include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.
100 115 The wireless communications systemmay operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEslocated indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
100 100 105 115 The wireless communications systemmay utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications systemmay employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entitiesand the UEsmay employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA). Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
105 140 170 115 105 115 105 105 105 115 115 A network entity(e.g., a base station, an RU) or a UEmay be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entityor a UEmay be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entitymay be located at diverse geographic locations. A network entitymay include an antenna array with a set of rows and columns of antenna ports that the network entitymay use to support beamforming of communications with a UE. Likewise, a UEmay include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
105 115 Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity, a UE) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).
105 115 105 140 170 115 105 105 105 115 105 A network entityor a UEmay use beam sweeping techniques as part of beamforming operations. For example, a network entity(e.g., a base station, an RU) may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a network entitymultiple times along different directions. For example, the network entitymay transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as a network entity, or by a receiving device, such as a UE) a beam direction for later transmission or reception by the network entity.
105 115 105 115 115 105 105 115 Some signals, such as data signals associated with a particular receiving device, may be transmitted by transmitting device (e.g., a transmitting network entity, a transmitting UE) along a single beam direction (e.g., a direction associated with the receiving device, such as a receiving network entityor a receiving UE). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted along one or more beam directions. For example, a UEmay receive one or more of the signals transmitted by the network entityalong different directions and may report to the network entityan indication of the signal that the UEreceived with a highest signal quality or an otherwise acceptable signal quality.
105 115 105 115 115 105 115 105 140 170 115 115 In some examples, transmissions by a device (e.g., by a network entityor a UE) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from a network entityto a UE). The UEmay report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more sub-bands. The network entitymay transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded. The UEmay provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted along one or more directions by a network entity(e.g., a base station, an RU), a UEmay employ similar techniques for transmitting signals multiple times along different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE) or for transmitting a signal along a single direction (e.g., for transmitting data to a receiving device).
115 105 A receiving device (e.g., a UE) may perform reception operations in accordance with multiple receive configurations (e.g., directional listening) when receiving various signals from a receiving device (e.g., a network entity), such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may perform reception in accordance with multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).
115 105 125 135 The UEsand the network entitiesmay support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., a communication link, a D2D communication link). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
115 105 115 105 105 115 105 For uplink and downlink communications (e.g., Uu communications) between a UEand a network entity, the UEand the network entitymay perform beam management procedures based on reference signals such as SSBs or CSI-RSs. For example, a network entitymay transmit an SSB, a CSI-RS, or both over multiple transmit beams, and the UEmay measure the reference signals to determine transmit and receive beams. Since each SSB and CSI-RS may span few symbols, the network entitymay enable beam sweeping over short periods of time.
115 115 115 115 115 115 115 115 115 115 115 UEsperforming sidelink communications may use a similar approach to perform sidelink beam management procedures. For example, a transmit UEmay transmit a new or enhanced sidelink reference signal or sidelink channel (e.g., sidelink SSBs, sidelink CSI-RSs) over multiple transmit beams, and receive UEsmay measure the sidelink reference signals to determine transmit and receive beams. A UEmay design such a sidelink reference signal to span few symbols to enable beam sweeping over short periods of time, such as in the Uu case. In some examples of sidelink beam management, each receive UEmay observe a variation in quality of the received reference signals with different beams on different occasions. In addition, a receive UEmay select a reference signal or channel (and its corresponding occasion) that is associated with a preferred transmit beam of the transmit UEand respond to the transmit UEaccordingly. The receive UEmay select the reference signal or channel based on a reference signal receive power (RSRP) of the reference signal or a decoding result of the message carried by the reference signal. In some cases, the response from the receive UEto the transmit UEmay be a reference signal transmitted via a resource or occasion associated with the selected reference signal occasion.
115 115 115 115 Alternatively, the UEsmay perform sidelink beam management procedures based on sidelink channels (e.g., PSSCH, PSCCH) with DMRSs. For example, a transmit UEmay transmit multiple sidelink channels with DMRSs over multiple beams, where the sidelink channels may carry sidelink data. Each sidelink channel with a DMRS may span one slot in accordance with the structure of a PSSCH or a PSCCH. Therefore, the transmit UEmay use up to one beam per slot for sidelink channel transmission and reception. In some examples, multiple PSSCHs may carry the same data (e.g., a data repetition). In addition, the receive UEmay utilize one or more physical sidelink feedback channel (PSFCH) resources for each transmitted (or received) sidelink channel to transmit HARQ-acknowledgement (ACK) feedback for the sidelink data carried in each sidelink channel.
115 115 115 115 115 115 In such cases, the receive UEmay monitor and receive the control channel with the DMRSs that are transmitted over multiple beams. The receive UEmay observe a variation of quality of the received sidelink channel with the DMRS on different beams. Accordingly, the receive UEmay select a sidelink channel with a DMRS that is associated with a preferred transmit beam (corresponding to the transmit UE), and the receive UEmay respond by transmitting HARQ-ACK feedback via a PSFCH resource associated with the selected sidelink channel. The receive UEmay select the sidelink channel with the DMRS based on a measured RSRP of the DMRS, a sidelink channel decoding result, or both.
100 115 115 115 115 The wireless communications systemsupports techniques for sidelink beam management based on sidelink reference signal and sidelink channel transmissions. A receive UEmay receive a set of multiple sidelink reference signals from a transmit UEvia a first set of time-frequency resources associated with a sidelink beam management configuration. The sidelink UEsmay use the sidelink reference signals for a sidelink beam management procedure in accordance with the sidelink beam management configuration. In some examples, the receive UEmay transmit a sidelink message in response to receiving the sidelink reference signals. The sidelink message may include feedback for the sidelink reference signals, and may indicate beam management information corresponding to the sidelink reference signals based on the sidelink beam management configuration. That is, the receive UE may report feedback and beam management information (e.g., beam measurements) that the transmit UE may use to perform the sidelink beam management procedure.
2 FIG. 200 200 100 100 200 115 115 115 115 a b a b shows an example of a wireless communications systemthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. In some examples, the wireless communications systemmay implement aspects of the wireless communications systemor may be implemented by aspects of the wireless communications system. For example, the wireless communications systemmay include a UE-and a UE-, which may be examples of corresponding devices described herein. The UE-and UE-may support sidelink communications and sidelink beam management procedures based on sidelink reference signal and sidelink channel transmissions.
200 115 115 115 205 125 115 115 115 115 115 115 210 225 a b a b 1 FIG. The wireless communications systemmay support communications between the UE-and the UE-. For example, the UEsmay perform sidelink communications via a communications link(e.g., a sidelink), which may be an example of a communication linkdescribed herein with reference to. As described herein, the UE-may be referred to as a transmit UEand the UE-may be referred to as a receive UE, however both UEsmay transmit and receive communications. The UEsmay utilize sidelink beam management procedures to measure and determine transmit and receive beams that may maintain or improve communications. The sidelink beam management procedures may be based on sidelink reference signals, DMRSs(e.g., PSCCH or PSSCH with DMRSs), or both.
115 210 115 115 215 115 210 115 115 105 115 210 115 115 210 115 115 a b a a a a a b. The UE-may transmit sidelink reference signalsto the UE-and/or to one or more other UEsvia a set of time-frequency resourcesassociated with a sidelink beam management configuration. That is, there may be other UEsmonitoring the same sidelink reference signalsas the UE-. The sidelink beam management configuration may be pre-configured for the UEs(e.g., by a network entity) such that they are enabled to perform sidelink beam management procedures. In some examples, the UE-may transmit the sidelink reference signalsfor sidelink beam management if the UE-lacks sidelink data to transmit. In this way, the UE-may transmit the sidelink reference signalsregularly (e.g., in a quasi-periodic manner) for beam maintenance and training or some other sidelink beam management procedure between the UE-and the UE-
115 210 220 210 215 115 210 220 1 220 2 220 3 220 4 215 115 210 215 210 215 220 a a a a b c d a a b b c c In addition, the UE-may transmit the sidelink reference signalsvia transmit beams, and may transmit multiple sets of the sidelink reference signalsvia different sets of time-frequency resources. For example, the UE-may transmit a set of multiple sidelink reference signals-via a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), and a transmit beam-(e.g., transmit beam) via a set of time-frequency resources-. In addition, the UE-may transmit sidelink reference signals-via a set of time-frequency resources-and sidelink reference signals-via a set of time-frequency resources-via multiple transmit beams.
115 225 115 225 115 225 115 115 220 225 210 225 a a a b a 3 FIG. In some cases, the UE-may transmit DMRSsassociated with a sidelink channel (e.g., PSSCH, PSCCH) via a second set of time-frequency resources. In some examples, the UE-may transmit the DMRSswhen the UE-has sidelink data to transmit, and as such the DMRSsmay enable the UE-to decode or demodulate sidelink data carried via the sidelink channel. In some examples, the UE-may repeat (or transmit repetitions of) the sidelink data over multiple sidelink channels using multiple transmit beamssuch that the DMRSsenable sidelink beam maintenance and training. The transmission of the sidelink reference signalsand the DMRSsis further described herein with reference to.
115 210 225 210 115 230 115 230 210 230 210 115 210 225 215 225 b b a a 3 6 FIGS.- The UE-may use the sidelink reference signals, the DMRSs, or both to perform the sidelink beam management procedure, which may include initial beam pairing, initial beam search, beam maintenance and training, beam measurements, beam prediction, beam failure recovery (BFR), and the like. As part of the sidelink beam management procedure, and in response to receiving the sidelink reference signals, the UE-may transmit a sidelink messageto the UE-. The sidelink messagemay include feedback for the sidelink reference signals. In addition, the sidelink messagemay indicate beam management information (e.g., beam measurements, selected beams, and the like) corresponding to the sidelink reference signalsbased on the sidelink beam management configuration. In some examples, as described herein with reference to, the UE-may perform the sidelink beam management procedure using the sidelink reference signals, the DMRSsor both based on whether the sets of time-frequency resourcesoverlap with the second set of time-frequency resources (via which the DMRSsare transmitted).
3 FIG. 1 2 FIGS.and 300 300 100 200 300 115 115 115 300 305 315 115 115 325 shows an example of a transmission schemethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. In some examples, the transmission schememay be implemented by wireless communications systemsand. For example, the transmission schememay be implemented by sidelink UEs(a transmit UEand a receive UE) as described with reference to. The transmission schemedepicts the transmission of sidelink reference signalsand DMRSsfrom the transmit UEto the receive UEvia multiple different transmit beams.
2 FIG. 115 305 115 310 115 115 305 115 305 310 305 310 305 310 115 305 325 115 305 325 1 325 2 325 3 325 4 115 305 115 a a b b c c a b c d As described with reference to, the transmit UEmay transmit sidelink reference signalsto the receive UEvia time-frequency resources, where the transmit UEand the receive UEmay use the sidelink reference signalsfor a sidelink beam management procedure. For example, the transmit UEmay transmit sidelink reference signals-via time-frequency resources-, sidelink reference signals-via time-frequency resources-, and sidelink reference signals-via time-frequency resources-. In addition, the transmit UEmay transmit the sidelink reference signalsusing different transmit beams. For example, the transmit UEmay transmit each set of sidelink reference signalsusing a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), or any combination thereof. The transmit UEmay transmit the sets of sidelink reference signalssemi-persistently, aperiodically, or according to a periodicity (periodically) based on a sidelink beam management configuration (e.g., which may be pre-configured for the UEs).
305 115 315 320 115 315 320 315 320 115 315 325 115 315 115 315 220 a a b b In addition to the sidelink reference signals, the transmit UEmay transmit sets of DMRSsassociated with a sidelink channel (e.g., PSSCH, PSCCH) via time-frequency resources(e.g., second sets of time-frequency resources). For example, the transmit UEmay transmit DMRSs-via time-frequency resources-and DMRSs-via time-frequency resources-. In addition, the transmit UEmay transmit the DMRSsusing different transmit beams. The sidelink channel may include sidelink data, which the receive UEmay decode or demodulate in accordance with the DMRSs. In this way, the transmit UEmay repeat (e.g., transmit repetitions of) the sidelink data over multiple sidelink channels and DMRSsusing multiple transmit beamsto enable the sidelink beam management procedure.
3 FIG. 4 FIG. 310 305 320 315 115 305 315 310 320 In the example of, the time-frequency resourcesused for transmitting the sidelink reference signalsand the time-frequency resourcesused for transmitting the DMRSsmay be non-overlapping. As such, the receive UEmay perform the sidelink beam management procedure using the sidelink reference signals, the DMRS, or both. A resource configuration associated with the time-frequency resourcesand the time-frequency resourcesis described herein with reference to.
115 305 315 115 305 315 305 115 325 115 325 305 325 315 In some cases, the receive UEmay perform beam maintenance or beam training using the sidelink reference signalsor the DMRS. Additionally, or alternatively, the receive UEmay observe both the sidelink reference signalsand the sidelink channels associated with the DMRSsthat may override (e.g., blank-out, puncture, drop, etc.) the sidelink reference signalsover time. In some examples, the receive UEmay measure the transmit beams(e.g., candidate transmit beams) over multiple reference signals or multiple sidelink channels for the sidelink beam management procedure. For example, the receive UEmay measure some transmit beamsbased on the sidelink reference signalsfor sidelink beam management and some other transmit beamsbased on the sidelink channels and DMRSs.
115 115 325 305 315 115 115 305 315 115 In some examples, the receive UEmay perform different measurements or other processes as part of the sidelink beam management procedure. For example, the receive UEmay measure an RSRP of the transmit beamsusing the sidelink reference signals, the DMRSs, or both and report the RSRP measurements to the transmit UE. That is, the receive UEmay perform a received power measurement procedure for the sidelink reference signals, the DMRSs, or a combination thereof, and the receive UEmay transmit a sidelink message to the transmit UE that indicates one or more RSRP measurements (as beam management information) associated with the received power measurement procedure.
115 315 325 115 115 115 115 305 315 Additionally, or alternatively, the receive UEmay monitor sidelink channels for the DMRSs, perform a decoding procedure, and select a transmit beamassociated with a sidelink channel for communications with the transmit UE. The receive UEmay transmit feedback (e.g., a HARQ-ACK message) to the transmit UEusing a PSFCH resource associated with the sidelink channel. In this way, the receive UEmay include feedback for the sidelink reference signals, the DMRSs, or both in the sidelink message.
115 305 315 115 305 315 115 305 315 310 320 In some examples, the receive UEmay initiate or perform a BFR procedure based on the sidelink reference signals, the DMRSs, or both. For example, the receive UEmay measure an RSRP of candidate or current transmit beams using the sidelink reference signals, the DMRSs, or both, and determine whether beam failure is triggered based on a comparison between the measured RSRPs and one or more RSRP thresholds. Put another way, the receive UEmay perform a received power measurement procedure for the sidelink reference signals, the DMRSs, or both and initiate a BFR procedure based on a beam failure that is triggered based on the one or more reference signal measurements and a measurement threshold. In such cases, the feedback included in the sidelink message may indicate time-frequency resources, time-frequency resources, or both associated with a reference signal measurement (a sidelink reference signal measurement or a DMRS measurement) that exceeds the measurement threshold (e.g., an RSRP threshold).
115 115 315 115 115 305 315 310 320 Additionally, or alternatively, the receive UEmay monitor a decoding result of one or more sidelink channels, count decoding failures, and determine whether beam failure is triggered based on the measured decoding failures and one or more error thresholds. That is, the receive UEmay decode one or more sidelink channels (e.g., PSSCHs, PSCCHs) associated with the DMRSs, and the receive UEmay initiate a BFR procedure based on a beam failure that is triggered based on the decoding of the sidelink channels and an error threshold. In this way, the receive UEmay perform a sidelink beam management procedure, which may include initial beam pairing, initial beam search, beam maintenance and training, beam measurements, beam prediction, BFR, and the like, based on the sidelink reference signals, the DMRSs, or both given that the time-frequency resourcesand the time-frequency resourcesare non-overlapping.
4 FIG. 1 2 FIGS.and 400 400 401 100 200 300 400 401 115 115 115 400 401 430 shows an example of a resource configurationthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. In some examples, the resource configurationsandmay be implemented by wireless communications systemsandand the transmission scheme. For example, the resource configurationsandmay be implemented by sidelink UEs(a transmit UEand a receive UE) as described with reference to. The resource configurationsanddepict how sidelink reference signals(configured for sidelink beam management) and sidelink channels (PSSCHs, PSCCHs) with DMRSs may be time-division multiplexed (TDMed) in a same slot.
400 115 430 115 405 410 415 420 410 415 425 410 415 420 420 a The resource configurationdepicts a sidelink data transmission using a sidelink channel (PSSCH, PSCCH) via a slot when the transmit UErefrains from transmitting sidelink reference signalsfor sidelink beam management. In such cases, the transmit UEmay transmit sidelink data-using a PSSCHand a PSCCHand DMRSsassociated with the PSSCHand the PSCCHover one or more transmit beams. The slot may include 14 symbols, one of which may be for automatic gain control (AGC). In addition, the slot may include symbols dedicated to the PSSCH, the PSCCH, and DMRSs. In some cases, each of the sidelink channels or DMRSsmay utilize a full frequency resource of the slot or part of the frequency resource.
3 FIG. 115 430 420 410 415 115 430 425 425 1 425 2 425 3 425 4 a b c d As described herein with reference to, a transmit UEmay transmit sidelink reference signalsvia a first set of time-frequency resources and DMRSsassociated with a sidelink channel (a PSSCHand a PSCCH) via a second set of time-frequency resources, where the first set of time-frequency resources and the second set of time-frequency resources may be non-overlapping. In addition, the transmit UEmay transmit the sidelink reference signalsusing different transmit beams, including a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), or any combination thereof.
401 405 430 405 420 410 415 430 425 430 115 430 425 425 425 425 425 115 425 430 115 405 430 b b a b c d b The resource configurationdepicts a sidelink data-and sidelink reference signalsTDMed in a slot, where the sidelink data-is transmitted with DMRSsassociated with a sidelink channel (a PSSCHand a PSCCH) and the sidelink reference signalsare transmitted using the transmit beams. In some cases, one of the symbols (OFDM symbols) associated with each reference signal may be for AGC. In some examples, symbols used for transmitting the sidelink reference signalsmay be located at the end of the slot. For example, the transmit UEmay transmit the sidelink reference signalsvia the transmit beam-, the transmit beam-, the transmit beam-, and the transmit beam-in the last eight symbols of the slot (with two symbols dedicated to each transmit beam). In this way, the transmit UEmay utilize beam sweeping across the transmit beamsto transmit the sidelink reference signals. The transmit UEmay transmit the sidelink data-using time-frequency resources that are non-overlapping with the time-frequency resources used to transmit the sidelink reference signalsfor sidelink beam management.
5 FIG. 1 2 FIGS.and 500 501 500 501 100 200 500 501 115 115 115 500 505 515 525 501 shows an example of a transmission schemeand a resource configurationthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. In some examples, the transmission schemeand the resource configurationmay be implemented by wireless communications systemsand. For example, the transmission schemeand the resource configurationmay be implemented by sidelink UEs(a transmit UEand a receive UE) as described with reference to. The transmission schemedepicts the transmission of sidelink reference signalsand DMRSsvia multiple different transmit beams. The resource configurationdepicts a sidelink data transmission using a sidelink channel via a slot.
2 FIG. 115 505 115 510 115 115 505 115 505 510 505 510 505 510 115 505 525 115 505 525 1 525 2 525 5 525 4 115 505 115 a a b b c c a b c d As described with reference to, a transmit UEmay transmit sidelink reference signalsto a receive UEvia time-frequency resources, where the transmit UEand the receive UEmay use the sidelink reference signalsfor a sidelink beam management procedure. For example, the transmit UEmay transmit sidelink reference signals-via time-frequency resources-, sidelink reference signals-via time-frequency resources-, and sidelink reference signals-via time-frequency resources-. In addition, the transmit UEmay transmit the sidelink reference signalsusing different transmit beams. For example, the transmit UEmay transmit each of the sidelink reference signals(e.g., each set) using a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), or any combination thereof. The transmit UEmay transmit the sidelink reference signalssemi-persistently, aperiodically, or according to a periodicity (periodically) based on a sidelink beam management configuration (e.g., which may be pre-configured for the UEs).
505 115 515 520 115 515 520 515 520 115 515 525 115 515 115 515 525 a a b b In addition to the sidelink reference signals, the transmit UEmay transmit DMRSs(e.g., sets of DMRSs) associated with a sidelink channel (e.g., PSSCH, PSCCH) via time-frequency resources(e.g., second sets of time-frequency resources). For example, the transmit UEmay transmit DMRSs-via time-frequency resources-and DMRSs-via time-frequency resources-. In addition, the transmit UEmay transmit the DMRSsusing different transmit beams. The sidelink channel may include sidelink data, which the receive UEmay decode or demodulate in accordance with the DMRSs. In this way, the transmit UEmay repeat (e.g., transmit repetitions of) the sidelink data over multiple sidelink channels and DMRSsusing multiple transmit beamsto enable the sidelink beam management procedure.
500 510 505 520 515 510 520 510 520 510 510 115 505 515 515 115 515 520 515 520 525 505 520 505 515 115 505 505 a a c b a c a b a a b b a a a a b In the example of the transmission scheme, some of the time-frequency resourcesused for transmitting the sidelink reference signalsand some of the time-frequency resourcesused for transmitting the DMRSsmay overlap. For example, the time-frequency resources-may overlap with the time-frequency resources-and the time-frequency resources-may overlap with the time-frequency resources-. In such cases, the time-frequency resources-and the time-frequency resources-the transmit UEuses for transmitting the sidelink reference signalsmay be overridden and replaced by the sidelink channel associated with the DMRSs-and the DMRSs-and the sidelink data. As such, the receive UEmay receive the DMRS-via the time-frequency resources-and the DMRSs-via the time-frequency resources-instead of using the transmit beamsfor sidelink beam management. As the sidelink reference signals-overlap with a slot of the time-frequency resources-, the sidelink reference signals-may be overridden by the sidelink channel and DMRSs, and the transmit UEmay drop the transmission of the sidelink reference signals-(in favor or transmitting the sidelink reference signals-, which may be non-overlapping with any sidelink data).
115 515 515 115 505 515 505 115 525 115 525 505 525 525 525 515 525 525 a b b d a c In some cases, the receive UEmay perform beam maintenance or beam training using the DMRS-and the DMRSs-. Additionally, or alternatively, the receive UEmay observe both the sidelink reference signalsand the sidelink channels associated with the DMRSsthat may override (e.g., blank-out, puncture, drop, etc.) the sidelink reference signalsover time as described herein. In some examples, the receive UEmay measure the transmit beams(e.g., candidate transmit beams) over multiple reference signals or multiple sidelink channels for the sidelink beam management procedure. For example, the receive UEmay measure some transmit beamsbased on the sidelink reference signalsfor sidelink beam management (e.g., the transmit beam-and the transmit beam-) and some other transmit beamsbased on the sidelink channels and DMRSs(e.g., the transmit beam-and the transmit beam-).
115 115 525 505 515 115 115 505 515 115 In some examples, the receive UEmay perform different measurements or other processes as part of the sidelink beam management procedure. For example, the receive UEmay measure an RSRP of the transmit beamsusing the sidelink reference signals, the DMRSs, or both and report the RSRP measurements to the transmit UE. That is, the receive UEmay perform a received power measurement procedure for the sidelink reference signals, the DMRSs, or a combination thereof, and the receive UEmay transmit a sidelink message to the transmit UE that indicates one or more RSRP measurements (as beam management information) associated with the received power measurement procedure.
115 515 525 115 115 115 115 505 515 Additionally, or alternatively, the receive UEmay monitor sidelink channels for the DMRSs, perform a decoding procedure, and select a transmit beamassociated with a sidelink channel for communications with the transmit UE. The receive UEmay transmit feedback (e.g., a HARQ-ACK message) to the transmit UEusing a PSFCH resource associated with the sidelink channel. In this way, the receive UEmay include feedback for the sidelink reference signals, the DMRSs, or both in the sidelink message.
115 505 515 115 505 515 115 505 515 510 520 In some examples, the receive UEmay initiate or perform a BFR procedure based on the sidelink reference signals, the DMRSs, or both. For example, the receive UEmay measure an RSRP of candidate or current transmit beams using the sidelink reference signals, the DMRSs, or both, and determine whether beam failure is triggered based on a comparison between the measured RSRPs and one or more RSRP thresholds. Put another way, the receive UEmay perform a received power measurement procedure for the sidelink reference signals, the DMRSs, or both and initiate a BFR procedure based on a beam failure that is triggered based on the one or more reference signal measurements and a measurement threshold. In such cases, the feedback included in the sidelink message may indicate time-frequency resources, time-frequency resources, or both associated with a reference signal measurement (a sidelink reference signal measurement or a DMRS measurement) that exceeds the measurement threshold (e.g., an RSRP threshold).
115 115 515 115 115 505 515 510 520 Additionally, or alternatively, the receive UEmay monitor a decoding result of one or more sidelink channels, count decoding failures, and determine whether beam failure is triggered based on the measured decoding failures and one or more error thresholds. That is, the receive UEmay decode one or more sidelink channels (e.g., PSSCHs, PSCCHs) associated with the DMRSs, and the receive UEmay initiate a BFR procedure based on a beam failure that is triggered based on the decoding of the sidelink channels and an error threshold. In this way, the receive UEmay perform a sidelink beam management procedure, which may include initial beam pairing, initial beam search, beam maintenance and training, beam measurements, beam prediction, BFR, and the like, based on the sidelink reference signals, the DMRSs, or both given that the time-frequency resourcesand the time-frequency resourcesare non-overlapping.
501 510 520 500 505 530 535 515 520 510 115 530 535 515 535 525 515 115 530 535 535 515 520 510 530 505 115 515 520 510 5 FIG. The resource configurationdepicts a sidelink data transmission using a sidelink channel (PSSCH, PSCCH) via a slot when the time-frequency resourcesand the time-frequency resourcesat least partially overlap (as described herein with reference toand the transmission scheme). In such cases, sidelink reference signalsfor sidelink beam management and sidelink dataassociated with a sidelink channel (e.g., a PSSCH) and DMRSsmay be TDMed in a slot based on the time-frequency resourcesoverriding or replacing the time-frequency resources. The transmit UEmay transmit sidelink datavia the PSSCHand the DMRSsassociated with the PSSCHover one or more transmit beams. For example, the slot may include 14 symbols, one of which may be for AGC. In addition, the slot may include two symbols for the DMRSsand the transmit UEmay use the remaining symbols for transmitting the sidelink datavia the PSSCH. In some cases, the PSSCHand the DMRSsmay utilize a full frequency resource of the slot or part of the frequency resource. Because the time-frequency resourcesoverlap with the time-frequency resources, transmission of the sidelink datamay override transmission of the sidelink reference signals. As such, the receive UEmay receive DMRSs(e.g., one or more DMRSs) via a subset of the time-frequency resourcesthat overlap with the time-frequency resources.
6 FIG. 1 2 FIGS.and 600 601 600 601 100 200 600 601 115 115 115 600 605 615 625 601 shows an example of a transmission schemeand a resource configurationthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. In some examples, the transmission schemeand the resource configurationmay be implemented by wireless communications systemsand. For example, the transmission schemeand the resource configurationmay be implemented by sidelink UEs(a transmit UEand a receive UE) as described with reference to. The transmission schemedepicts the transmission of sidelink reference signalsand DMRSsvia multiple different transmit beams. The resource configurationdepicts a sidelink data transmission using a sidelink channel via a slot.
2 FIG. 115 605 115 610 115 115 605 115 605 610 605 610 605 610 115 605 625 115 605 625 1 625 2 625 5 625 4 115 605 115 a a b b c c a b c d As described with reference to, a transmit UEmay transmit sidelink reference signalsto a receive UEvia time-frequency resources, where the transmit UEand the receive UEmay use the sidelink reference signalsfor a sidelink beam management procedure. For example, the transmit UEmay transmit sidelink reference signals-via time-frequency resources-, sidelink reference signals-via time-frequency resources-, and sidelink reference signals-via time-frequency resources-. In addition, the transmit UEmay transmit the sidelink reference signalsusing different transmit beams. For example, the transmit UEmay transmit each of the sidelink reference signals(e.g., each set of sidelink reference signals) using a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), a transmit beam-(e.g., transmit beam), or any combination thereof. The transmit UEmay transmit the sets of sidelink reference signalssemi-persistently, aperiodically, or according to a periodicity (periodically) based on a sidelink beam management configuration (e.g., which may be pre-configured for the UEs).
605 115 615 640 645 620 115 615 620 615 620 115 615 625 115 615 115 615 220 a a b b In addition to the sidelink reference signals, the transmit UEmay transmit DMRSsassociated with a sidelink channel (e.g., a PSSCH, a PSCCH) via time-frequency resources(e.g., second sets of time-frequency resources). For example, the transmit UEmay transmit DMRSs-via time-frequency resources-and DMRSs-via time-frequency resources-. In addition, the transmit UEmay transmit the DMRSsusing different transmit beams. The sidelink channel may include sidelink data, which the receive UEmay decode or demodulate in accordance with the DMRSs. In this way, the transmit UEmay repeat (e.g., transmit repetitions of) the sidelink data over multiple sidelink channels and DMRSsusing multiple transmit beamsto enable the sidelink beam management procedure.
600 610 605 620 615 610 620 610 620 610 610 605 615 615 625 625 a a c b a c a b In the example of the transmission scheme, some of the time-frequency resourcesused for transmitting the sidelink reference signalsand some of the time-frequency resourcesused for transmitting the DMRSsmay overlap. For example, the time-frequency resources-may overlap with the time-frequency resources-and the time-frequency resources-may overlap with the time-frequency resources-. In such cases, the time-frequency resources-and the time-frequency resources-used for transmitting the sidelink reference signalsmay be overridden and replaced by the sidelink channel associated with the DMRSs-and the DMRSs-and the sidelink data. As such, sidelink reference signals may be overridden or replaced by sidelink channels carrying the sidelink data if the sidelink reference signals and the sidelink channel are associated with a same transmit beam, such that other sidelink reference signals corresponding to different transmit beamsmay still remain.
605 625 625 625 625 615 625 610 620 625 115 625 615 605 625 625 625 605 625 625 625 625 615 625 610 620 625 115 625 615 605 625 625 625 a a b c d a a a a a a b c d c a b c d b c c b c c a b d. For example, the set of sidelink reference signals-may correspond to the transmit beams-,-,-, and-, and the set of DMRSs-may correspond to the transmit beam-. As such, the time-frequency resources-and the time-frequency resources-only overlap for the transmit beam-, and therefore, the transmit UEmay override a sidelink reference signal transmission over the transmit beam-with sidelink data or a DMRS, however may maintain the transmission of the sidelink reference signalsover the transmit beams-,-, and-. Additionally, or alternatively, the set of sidelink reference signals-may correspond to the transmit beams-,-,-, and-, and the set of DMRSs-may correspond to the transmit beam-. As such, the time-frequency resources-and the time-frequency resources-only overlap for the transmit beam-, and therefore, the transmit UEmay override a sidelink reference signal transmission over the transmit beam-with sidelink data or a DMRS, however may maintain the transmission of the sidelink reference signalsover the transmit beams-,-, and-
115 615 115 605 615 605 115 625 115 625 605 625 625 625 615 625 625 b d a c In some cases, the receive UEmay perform beam maintenance or beam training using the non-replaced or non-overridden sidelink reference signals, the DMRSs, or a combination thereof. Additionally, or alternatively, the receive UEmay observe both the sidelink reference signalsand the sidelink channels associated with the DMRSsthat may override (e.g., blank-out, puncture, drop, etc.) the sidelink reference signalsover time as described herein. In some examples, the receive UEmay measure the transmit beams(e.g., candidate transmit beams) over multiple reference signals or multiple sidelink channels for the sidelink beam management procedure. For example, the receive UEmay measure some transmit beamsbased on the sidelink reference signalsfor sidelink beam management (e.g., the transmit beam-and the transmit beam-) and some other transmit beamsbased on the sidelink channels and DMRSs(e.g., the transmit beam-and the transmit beam-).
115 115 625 605 615 115 115 605 615 115 In some examples, the receive UEmay perform different measurements or other processes as part of the sidelink beam management procedure. For example, the receive UEmay measure an RSRP of the transmit beamsusing the sidelink reference signals, the DMRSs, or both and report the RSRP measurements to the transmit UE. That is, the receive UEmay perform a received power measurement procedure for the sidelink reference signals, the DMRSs, or a combination thereof, and the receive UEmay transmit a sidelink message to the transmit UE that indicates one or more RSRP measurements (as beam management information) associated with the received power measurement procedure.
115 615 625 115 115 115 115 605 615 Additionally, or alternatively, the receive UEmay monitor sidelink channels for the DMRSs, perform a decoding procedure, and select a transmit beamassociated with a sidelink channel for communications with the transmit UE. The receive UEmay transmit feedback (e.g., a HARQ-ACK message) to the transmit UEusing a PSFCH resource associated with the sidelink channel. In this way, the receive UEmay include feedback for the sidelink reference signals, the DMRSs, or both in the sidelink message.
115 605 615 115 605 615 115 605 615 610 620 In some examples, the receive UEmay initiate or perform a BFR procedure based on the sidelink reference signals, the DMRSs, or both. For example, the receive UEmay measure an RSRP of candidate or current transmit beams using the sidelink reference signals, the DMRSs, or both, and determine whether beam failure is triggered based on a comparison between the measured RSRPs and one or more RSRP thresholds. Put another way, the receive UEmay perform a received power measurement procedure for the sidelink reference signals, the DMRSs, or both and initiate a BFR procedure based on a beam failure that is triggered based on the one or more reference signal measurements and a measurement threshold. In such cases, the feedback included in the sidelink message may indicate time-frequency resources, time-frequency resources, or both associated with a reference signal measurement (a sidelink reference signal measurement or a DMRS measurement) that exceeds the measurement threshold (e.g., an RSRP threshold).
115 115 615 115 115 605 615 610 620 625 Additionally, or alternatively, the receive UEmay monitor a decoding result of one or more sidelink channels, count decoding failures, and determine whether beam failure is triggered based on the measured decoding failures and one or more error thresholds. That is, the receive UEmay decode one or more sidelink channels (e.g., PSSCHs, PSCCHs) associated with the DMRSs, and the receive UEmay initiate a BFR procedure based on a beam failure that is triggered based on the decoding of the sidelink channels and an error threshold. In this way, the receive UEmay perform a sidelink beam management procedure, which may include initial beam pairing, initial beam search, beam maintenance and training, beam measurements, beam prediction, BFR, and the like, based on the sidelink reference signals, the DMRSs, or both given that the time-frequency resourcesand the time-frequency resourcesare non-overlapping for the same transmit beam.
601 635 630 640 645 615 625 615 630 600 601 620 625 6 FIG. a a. The resource configurationdepicts sidelink reference signalsand sidelink data(PSSCHs, PSCCHs, and DMRSs) that are TDMed in a slot based on overriding a sidelink reference signal that is associated with a same transmit beamas a DMRSassociated with the sidelink data(as described herein with reference toand the transmission scheme). The resource configurationmay depict a slot that corresponds to the time-frequency resources-, in which a sidelink reference signal overlaps with sidelink data over the transmit beam-
635 115 635 625 625 625 625 625 630 115 625 635 115 630 615 640 645 635 b c d a In such cases, the slot may include 14 symbols (OFDM symbols), one of which may be for AGC. Symbols used for transmitting the sidelink reference signalsmay be located at the end of the slot. For example, the transmit UEmay transmit the sidelink reference signalsvia the transmit beam-, the transmit beam-, and the transmit beam-in the last six symbols of the slot (with two symbols dedicated to each transmit beam). A sidelink reference signal transmission using the transmit beam-may be excluded from the slot as the corresponding sidelink reference signal may be overridden by the sidelink channel carrying the sidelink data. In this way, the transmit UEmay utilize beam sweeping across the transmit beamsto transmit the sidelink reference signals. The transmit UEmay transmit the sidelink dataand the DMRSsusing time-frequency resources (PSSCH, PSCCH) that are non-overlapping with the time-frequency resources used to transmit the sidelink reference signalsfor sidelink beam management.
7 FIG. 700 700 100 200 100 200 700 115 115 700 115 115 115 115 700 700 c d c d c d shows an example of a process flowthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The process flowmay implement aspects of wireless communications systemsand, or may be implemented by aspects of the wireless communications systemand. For example, the process flowmay illustrate operations between a UE-and a UE-, which may be examples of corresponding devices described herein. In the following description of the process flow, the operations between the UE-and the UE-may be transmitted in a different order than the example order shown, or the operations performed by the UE-and the UE-may be performed in different orders or at different times. Some operations may also be omitted from the process flow, and other operations may be added to the process flow.
705 115 115 115 115 c d c d At, the UE-may receive, from the UE-and via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the UE-and the UE-in accordance with the sidelink beam management configuration. In some examples, the sidelink reference signals may be transmitted semi-persistently, periodically, or aperiodically. In addition, the sidelink reference signals may be transmitted using one or more transmit beams.
710 115 115 115 c d c At, the UE-may receive, from the UE-via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources may be non-overlapping, partially-overlapping, or fully-overlapping with the set of time-frequency resources. If the sets of time-frequency resources are non-overlapping, the sidelink reference signals and the DMRSs may be TDMed in a slot such that the UE-may receive both types of information. Alternatively, if the sets of time-frequency resources are at least partially overlapping, one or more time-frequency resources of the set of time-frequency resources corresponding to the sidelink reference signals may be replaced or overridden with a sidelink channel associated with the DMRSs. In some examples, the sidelink channel may be associated with a same transmit beam as the sidelink reference signal associated with the one or more time-frequency resources.
715 115 c At, the UE-may perform a sidelink beam management procedure using the set of multiple sidelink reference signals, the set of multiple DMRSs, or both. In some examples, whether the sidelink beam management procedure is based on the sidelink reference signals, DRMSs, or both may depend on whether or not the respective sets of time-frequency resources are overlapping. In some cases, the sidelink beam management procedure may include initial beam pairing, initial beam search, beam maintenance and training, beam measurements (e.g., RSRP measurements), beam prediction, BFR, and the like.
720 115 115 115 115 c c c d At, the UE-may transmit, to the UE-and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. In this way, the UE-may measure or otherwise process the sidelink reference signals, the DMRSs, or both and report feedback to the UE-to enable sidelink beam management.
8 FIG. 800 805 805 805 810 815 820 805 shows a block diagramof a devicethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The devicemay be an example of aspects of a receive UE as described herein. The devicemay include a receiver, a transmitter, and a communications manager. The devicemay also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
810 805 810 The receivermay provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to sidelink beam management based on reference signal and sidelink channel transmissions). Information may be passed on to other components of the device. The receivermay utilize a single antenna or a set of multiple antennas.
815 805 815 815 810 815 The transmittermay provide a means for transmitting signals generated by other components of the device. For example, the transmittermay transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to sidelink beam management based on reference signal and sidelink channel transmissions). In some examples, the transmittermay be co-located with a receiverin a transceiver module. The transmittermay utilize a single antenna or a set of multiple antennas.
820 810 815 820 810 815 The communications manager, the receiver, the transmitter, or various combinations thereof or various components thereof may be examples of means for performing various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, the communications manager, the receiver, the transmitter, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
820 810 815 In some examples, the communications manager, the receiver, the transmitter, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory).
820 810 815 820 810 815 Additionally, or alternatively, in some examples, the communications manager, the receiver, the transmitter, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager, the receiver, the transmitter, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure).
820 810 815 820 810 815 810 815 In some examples, the communications managermay be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver, the transmitter, or both. For example, the communications managermay receive information from the receiver, send information to the transmitter, or be integrated in combination with the receiver, the transmitter, or both to obtain information, output information, or perform various other operations as described herein.
820 820 820 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manageris capable of, configured to, or operable to support a means for receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The communications manageris capable of, configured to, or operable to support a means for transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
820 805 810 815 820 By including or configuring the communications managerin accordance with examples as described herein, the device(e.g., a processor controlling or otherwise coupled with the receiver, the transmitter, the communications manager, or a combination thereof) may support techniques for sidelink beam management procedures, which may improve beam selection, beam measurement, and BFR between sidelink UEs. Thus, the techniques described herein may support improved communications between the sidelink UEs, reduced overhead, improved decoding success, and reduced beam failure.
9 FIG. 900 905 905 805 115 905 910 915 920 905 shows a block diagramof a devicethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The devicemay be an example of aspects of a deviceor a receive UEas described herein. The devicemay include a receiver, a transmitter, and a communications manager. The devicemay also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
910 905 910 The receivermay provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to sidelink beam management based on reference signal and sidelink channel transmissions). Information may be passed on to other components of the device. The receivermay utilize a single antenna or a set of multiple antennas.
915 905 915 915 910 915 The transmittermay provide a means for transmitting signals generated by other components of the device. For example, the transmittermay transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to sidelink beam management based on reference signal and sidelink channel transmissions). In some examples, the transmittermay be co-located with a receiverin a transceiver module. The transmittermay utilize a single antenna or a set of multiple antennas.
905 920 925 930 920 820 920 910 915 920 910 915 910 915 The device, or various components thereof, may be an example of means for performing various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, the communications managermay include a sidelink reference signal componenta sidelink message component, or any combination thereof. The communications managermay be an example of aspects of a communications manageras described herein. In some examples, the communications manager, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver, the transmitter, or both. For example, the communications managermay receive information from the receiver, send information to the transmitter, or be integrated in combination with the receiver, the transmitter, or both to obtain information, output information, or perform various other operations as described herein.
920 925 930 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. The sidelink reference signal componentis capable of, configured to, or operable to support a means for receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The sidelink message componentis capable of, configured to, or operable to support a means for transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
10 FIG. 1000 1020 1020 820 920 1020 1020 1025 1030 1035 1040 1045 1050 1055 shows a block diagramof a communications managerthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The communications managermay be an example of aspects of a communications manager, a communications manager, or both, as described herein. The communications manager, or various components thereof, may be an example of means for performing various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, the communications managermay include a sidelink reference signal component, a sidelink message component, a DMRS component, a beam management component, an RSRP measurement component, an BFR component, a decoding component, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories), may communicate, directly or indirectly, with one another (e.g., via one or more buses).
1020 1025 1030 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. The sidelink reference signal componentis capable of, configured to, or operable to support a means for receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The sidelink message componentis capable of, configured to, or operable to support a means for transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
1035 In some examples, the DMRS componentis capable of, configured to, or operable to support a means for receiving, from the second UE via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources is non-overlapping with the set of time-frequency resources.
1040 In some examples, the beam management componentis capable of, configured to, or operable to support a means for performing the sidelink beam management procedure using the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
1045 In some examples, the RSRP measurement componentis capable of, configured to, or operable to support a means for performing a received power measurement procedure for the set of multiple sidelink reference signals, the set of multiple DMRSs, or a combination thereof, where the sidelink message indicates one or more received power measurements associated with the received power measurement procedure. In some examples, the feedback indicates resources associated with a reference signal measurement that exceeds a measurement threshold.
1045 1050 In some examples, the RSRP measurement componentis capable of, configured to, or operable to support a means for performing a received power measurement procedure for the set of multiple sidelink reference signals, the set of multiple DMRSs, or a combination thereof. In some examples, the BFR componentis capable of, configured to, or operable to support a means for initiating a BFR procedure based on a beam failure that is triggered based on one or more reference signal measurements and a measurement threshold.
1055 1050 In some examples, the decoding componentis capable of, configured to, or operable to support a means for decoding a set of multiple sidelink channels associated with the set of multiple DMRSs. In some examples, the BFR componentis capable of, configured to, or operable to support a means for initiating a BFR procedure based on a beam failure that is triggered based on the decoding of the set of multiple sidelink channels and an error threshold.
In some examples, the set of multiple sidelink reference signals and a set of multiple sidelink channels associated with the set of multiple DMRSs are TDMed in a slot.
1035 In some examples, the DMRS componentis capable of, configured to, or operable to support a means for receiving, from the second UE via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources at least partially overlaps the set of time-frequency resources.
1035 In some examples, to support receiving the set of multiple DMRSs, the DMRS componentis capable of, configured to, or operable to support a means for receiving one or more DMRSs of the set of multiple DMRSs via a subset of the second set of time-frequency resources, where the subset overlaps the set of time-frequency resources.
In some examples, a time-frequency resource of the set of time-frequency resources is replaced with the sidelink channel associated with the set of multiple DMRSs based on the sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the time-frequency resource.
In some examples, the set of multiple sidelink reference signals are received semi-persistently, aperiodically, or according to a periodicity based on the sidelink beam management configuration.
11 FIG. 1100 1105 1105 805 905 1105 1120 1110 1115 1125 1130 1135 1140 1145 shows a diagram of a systemincluding a devicethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The devicemay be an example of or include the components of a device, a device, or a receive UE as described herein. The devicemay include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager, an I/O controller, a transceiver, an antenna, a memory, code, and a processor. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus).
1110 1105 1110 1105 1110 1110 1110 1110 1140 1105 1110 1110 The I/O controllermay manage input and output signals for the device. The I/O controllermay also manage peripherals not integrated into the device. In some cases, the I/O controllermay represent a physical connection or port to an external peripheral. In some cases, the I/O controllermay utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. Additionally, or alternatively, the I/O controllermay represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controllermay be implemented as part of a processor, such as the processor. In some cases, a user may interact with the devicevia the I/O controlleror via hardware components controlled by the I/O controller.
1105 1125 1105 1125 1115 1125 1115 1115 1125 1125 1115 1115 1125 815 915 810 910 In some cases, the devicemay include a single antenna. However, in some other cases, the devicemay have more than one antenna, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceivermay communicate bi-directionally, via the one or more antennas, wired, or wireless links as described herein. For example, the transceivermay represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceivermay also include a modem to modulate the packets, to provide the modulated packets to one or more antennasfor transmission, and to demodulate packets received from the one or more antennas. The transceiver, or the transceiverand one or more antennas, may be an example of a transmitter, a transmitter, a receiver, a receiver, or any combination thereof or component thereof, as described herein.
1130 1130 1135 1140 1105 1135 1135 1140 1130 The memorymay include RAM and ROM. The memorymay store computer-readable, computer-executable codeincluding instructions that, when executed by the processor, cause the deviceto perform various functions described herein. The codemay be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the codemay not be directly executable by the processorbut may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memorymay contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
1140 1140 1140 1140 1130 1105 1105 1105 1140 1130 1140 1140 1130 The processormay include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof, which may be understood as one or more processors). In some cases, the processormay be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor. The processormay be configured to execute computer-readable instructions stored in a memory (e.g., the memory) to cause the deviceto perform various functions (e.g., functions or tasks supporting sidelink beam management based on reference signal and sidelink channel transmissions). For example, the deviceor a component of the devicemay include a processorand memorycoupled with or to the processor, the processorand memoryconfigured to perform various functions described herein.
1120 1120 1120 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manageris capable of, configured to, or operable to support a means for receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The communications manageris capable of, configured to, or operable to support a means for transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
1120 1105 By including or configuring the communications managerin accordance with examples as described herein, the devicemay support techniques for sidelink beam management procedures, which may improve beam selection, beam measurement, and BFR between sidelink UEs. Thus, the techniques described herein may support improved communications between the sidelink UEs, reduced overhead, improved decoding success, reduced beam failure, and reduced processing.
1120 1115 1125 1120 1120 1140 1130 1135 1135 1140 1105 1140 1130 In some examples, the communications managermay be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver, the one or more antennas, or any combination thereof. Although the communications manageris illustrated as a separate component, in some examples, one or more functions described with reference to the communications managermay be supported by or performed by the processor, the memory, the code, or any combination thereof. For example, the codemay include instructions executable by the processorto cause the deviceto perform various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein, or the processorand the memorymay be otherwise configured to perform or support such operations.
12 FIG. 1200 1205 1205 1205 1210 1215 1220 1205 shows a block diagramof a devicethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The devicemay be an example of aspects of a transmit UE as described herein. The devicemay include a receiver, a transmitter, and a communications manager. The devicemay also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
1210 1205 1210 1210 The receivermay provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). Information may be passed on to other components of the device. In some examples, the receivermay support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receivermay support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
1215 1205 1215 1215 1215 1215 1210 The transmittermay provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device. For example, the transmittermay output information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). In some examples, the transmittermay support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmittermay support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitterand the receivermay be co-located in a transceiver, which may include or be coupled with a modem.
1220 1210 1215 1220 1210 1215 The communications manager, the receiver, the transmitter, or various combinations thereof or various components thereof may be examples of means for performing various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, the communications manager, the receiver, the transmitter, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
1220 1210 1215 In some examples, the communications manager, the receiver, the transmitter, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory).
1220 1210 1215 1220 1210 1215 Additionally, or alternatively, in some examples, the communications manager, the receiver, the transmitter, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager, the receiver, the transmitter, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure).
1220 1210 1215 1220 1210 1215 1210 1215 In some examples, the communications managermay be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver, the transmitter, or both. For example, the communications managermay receive information from the receiver, send information to the transmitter, or be integrated in combination with the receiver, the transmitter, or both to obtain information, output information, or perform various other operations as described herein.
1220 1220 1220 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manageris capable of, configured to, or operable to support a means for transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The communications manageris capable of, configured to, or operable to support a means for receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
1220 1205 1210 1215 1220 By including or configuring the communications managerin accordance with examples as described herein, the device(e.g., a processor controlling or otherwise coupled with the receiver, the transmitter, the communications manager, or a combination thereof) may support techniques for sidelink beam management procedures, which may improve beam selection, beam measurement, and BFR between sidelink UEs. Thus, the techniques described herein may support improved communications between the sidelink UEs, reduced overhead, improved decoding success, reduced beam failure, and reduced processing.
13 FIG. 1300 1305 1305 1205 115 1305 1310 1315 1320 1305 shows a block diagramof a devicethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The devicemay be an example of aspects of a deviceor a transmit UEas described herein. The devicemay include a receiver, a transmitter, and a communications manager. The devicemay also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
1310 1305 1310 1310 The receivermay provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). Information may be passed on to other components of the device. In some examples, the receivermay support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receivermay support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
1315 1305 1315 1315 1315 1315 1310 The transmittermay provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device. For example, the transmittermay output information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). In some examples, the transmittermay support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmittermay support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitterand the receivermay be co-located in a transceiver, which may include or be coupled with a modem.
1305 1320 1325 1330 1320 1220 1320 1310 1315 1320 1310 1315 1310 1315 The device, or various components thereof, may be an example of means for performing various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, the communications managermay include a configuration componenta feedback component, or any combination thereof. The communications managermay be an example of aspects of a communications manageras described herein. In some examples, the communications manager, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver, the transmitter, or both. For example, the communications managermay receive information from the receiver, send information to the transmitter, or be integrated in combination with the receiver, the transmitter, or both to obtain information, output information, or perform various other operations as described herein.
1320 1325 1330 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. The configuration componentis capable of, configured to, or operable to support a means for transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The feedback componentis capable of, configured to, or operable to support a means for receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
14 FIG. 1400 1420 1420 1220 1320 1420 1420 1425 1430 1435 1440 shows a block diagramof a communications managerthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The communications managermay be an example of aspects of a communications manager, a communications manager, or both, as described herein. The communications manager, or various components thereof, may be an example of means for performing various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein. For example, the communications managermay include a configuration component, a feedback component, a DMRS resource component, a sidelink beam management component, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories), may communicate, directly or indirectly, with one another (e.g., via one or more buses).
1420 1425 1430 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. The configuration componentis capable of, configured to, or operable to support a means for transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The feedback componentis capable of, configured to, or operable to support a means for receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
1435 In some examples, the DMRS resource componentis capable of, configured to, or operable to support a means for transmitting, using the set of multiple transmit beams and via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources is non-overlapping with the set of time-frequency resources.
In some examples, the sidelink beam management procedure is based on the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
In some examples, the feedback indicates a set of multiple received power measurements associated with the set of multiple transmit beams based on the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
In some examples, the feedback indicates resources associated with at least one transmit beam of the set of multiple transmit beams based on the set of multiple sidelink reference signals, the set of multiple DMRSs, or both.
In some examples, the set of multiple sidelink reference signals and a set of multiple sidelink channels associated with the set of multiple DMRSs are TDMed in a slot.
1435 In some examples, the DMRS resource componentis capable of, configured to, or operable to support a means for transmitting, using the set of multiple transmit beams and via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources at least partially overlap the set of time-frequency resources.
1435 In some examples, to support transmitting the set of multiple DMRSs, the DMRS resource componentis capable of, configured to, or operable to support a means for transmitting one or more DMRSs of the set of multiple DMRSs via a subset of the second set of time-frequency resources, where the subset overlaps the set of time-frequency resources.
In some examples, a time-frequency resource of the set of time-frequency resources is replaced with the sidelink channel associated with the set of multiple DMRSs based on the sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the time-frequency resource.
In some examples, the set of multiple sidelink reference signals are transmitted semi-persistently, aperiodically, or according to a periodicity based on the sidelink beam management configuration.
15 FIG. 1500 1505 1505 1205 1305 1505 1520 1510 1515 1525 1530 1535 1540 shows a diagram of a systemincluding a devicethat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with one or more aspects of the present disclosure. The devicemay be an example of or include the components of a device, a device, or a transmit UE as described herein. The devicemay include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager, a transceiver, an antenna, a memory, code, and a processor. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus).
1510 1510 1510 1505 1515 1510 1515 1515 1510 1515 1515 1510 1510 1510 1515 1510 1515 1535 1525 1505 125 120 162 168 The transceivermay support bi-directional communications via wired links, wireless links, or both as described herein. In some examples, the transceivermay include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally, or alternatively, in some examples, the transceivermay include a wireless transceiver and may communicate bi-directionally with another wireless transceiver. In some examples, the devicemay include one or more antennas, which may be capable of transmitting or receiving wireless transmissions (e.g., concurrently). The transceivermay also include a modem to modulate signals, to provide the modulated signals for transmission (e.g., by one or more antennas, by a wired transmitter), to receive modulated signals (e.g., from one or more antennas, from a wired receiver), and to demodulate signals. In some implementations, the transceivermay include one or more interfaces, such as one or more interfaces coupled with the one or more antennasthat are configured to support various receiving or obtaining operations, or one or more interfaces coupled with the one or more antennasthat are configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceivermay include or be configured for coupling with one or more processors or memory components that are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other outputting, or any combination thereof. In some implementations, the transceiver, or the transceiverand the one or more antennas, or the transceiverand the one or more antennasand one or more processors or memory components (for example, the processor, or the memory, or both), may be included in a chip or chip assembly that is installed in the device. In some examples, the transceiver may be operable to support communications via one or more communications links (e.g., a communication link, a backhaul communication link, a midhaul communication link, a fronthaul communication link).
1525 1525 1530 1535 1505 1530 1530 1535 1525 The memorymay include RAM and ROM (such as one or more memories). The memorymay store computer-readable, computer-executable codeincluding instructions that, when executed by the processor, cause the deviceto perform various functions described herein. The codemay be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the codemay not be directly executable by the processorbut may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memorymay contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
1535 1535 1535 1535 1525 1505 1505 1505 1535 1525 1535 1535 1525 1535 1530 1505 1535 1505 1525 1535 1505 1505 1505 1535 1510 1520 1505 1505 1505 1505 1505 1505 The processormay include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, discrete gate or transistor logic, a discrete hardware component, or any combination thereof). In some cases, the processormay be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor. The processormay be configured to execute computer-readable instructions stored in a memory (e.g., the memory) to cause the deviceto perform various functions (e.g., functions or tasks supporting sidelink beam management based on reference signal and sidelink channel transmissions). For example, the deviceor a component of the devicemay include a processorand memorycoupled with the processor, the processorand memoryconfigured to perform various functions described herein. The processormay be an example of a cloud-computing platform (e.g., one or more physical nodes and supporting software such as operating systems, virtual machines, or container instances) that may host the functions (e.g., by executing code) to perform the functions of the device. The processormay be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device(such as within the memory). In some implementations, the processormay be a component of a processing system. A processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the device). For example, a processing system of the devicemay refer to a system including the various other components or subcomponents of the device, such as the processor, or the transceiver, or the communications manager, or other components or combinations of components of the device. The processing system of the devicemay interface with other components of the device, and may process information received from other components (such as inputs or signals) or output information to other components. For example, a chip or modem of the devicemay include a processing system and one or more interfaces to output information, or to obtain information, or both. The one or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information, or a same interface configured to output information and to obtain information, among other implementations. In some implementations, the one or more interfaces may refer to an interface between the processing system of the chip or modem and a transmitter, such that the devicemay transmit information output from the chip or modem. Additionally, or alternatively, in some implementations, the one or more interfaces may refer to an interface between the processing system of the chip or modem and a receiver, such that the devicemay obtain information or signal inputs, and the information may be passed to the processing system. A person having ordinary skill in the art will readily recognize that a first interface also may obtain information or signal inputs, and a second interface also may output information or signal outputs.
1540 1540 1505 1505 1505 1520 1510 1525 1530 1535 In some examples, a busmay support communications of (e.g., within) a protocol layer of a protocol stack. In some examples, a busmay support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack), which may include communications performed within a component of the device, or between different components of the devicethat may be co-located or located in different locations (e.g., where the devicemay refer to a system in which one or more of the communications manager, the transceiver, the memory, the code, and the processormay be located in one of the different components or divided between different components).
1520 130 1520 115 1520 105 115 105 1520 105 In some examples, the communications managermay manage aspects of communications with a core network(e.g., via one or more wired or wireless backhaul links). For example, the communications managermay manage the transfer of data communications for client devices, such as one or more UEs. In some examples, the communications managermay manage communications with other network entities, and may include a controller or scheduler for controlling communications with UEsin cooperation with other network entities. In some examples, the communications managermay support an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between network entities.
1520 1520 1520 The communications managermay support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manageris capable of, configured to, or operable to support a means for transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The communications manageris capable of, configured to, or operable to support a means for receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration.
1520 1505 By including or configuring the communications managerin accordance with examples as described herein, the devicemay support techniques for sidelink beam management procedures, which may improve beam selection, beam measurement, and BFR between sidelink UEs. Thus, the techniques described herein may support improved communications between the sidelink UEs, reduced overhead, improved decoding success, reduced beam failure, and reduced processing.
1520 1510 1515 1520 1520 1510 1535 1525 1530 1530 1535 1505 1535 1525 In some examples, the communications managermay be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the transceiver, the one or more antennas(e.g., where applicable), or any combination thereof. Although the communications manageris illustrated as a separate component, in some examples, one or more functions described with reference to the communications managermay be supported by or performed by the transceiver, the processor, the memory, the code, or any combination thereof. For example, the codemay include instructions executable by the processorto cause the deviceto perform various aspects of sidelink beam management based on reference signal and sidelink channel transmissions as described herein, or the processorand the memorymay be otherwise configured to perform or support such operations.
16 FIG. 1 11 FIGS.through 1600 1600 1600 shows a flowchart illustrating a methodthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with aspects of the present disclosure. The operations of the methodmay be implemented by a receive UE or its components as described herein. For example, the operations of the methodmay be performed by a receive UE as described with reference to. In some examples, a receive UE may execute a set of instructions to control the functional elements of the wireless receive UE to perform the described functions. Additionally, or alternatively, the wireless receive UE may perform aspects of the described functions using special-purpose hardware.
1605 1605 1605 1025 10 FIG. At, the method may include receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a sidelink reference signal componentas described with reference to.
1610 1610 1610 1030 10 FIG. At, the method may include transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a sidelink message componentas described with reference to.
17 FIG. 1 11 FIGS.through 1700 1700 1700 shows a flowchart illustrating a methodthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with aspects of the present disclosure. The operations of the methodmay be implemented by a receive UE or its components as described herein. For example, the operations of the methodmay be performed by a receive UE as described with reference to. In some examples, a receive UE may execute a set of instructions to control the functional elements of the wireless receive UE to perform the described functions. Additionally, or alternatively, the wireless receive UE may perform aspects of the described functions using special-purpose hardware.
1705 1705 1705 1025 10 FIG. At, the method may include receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a sidelink reference signal componentas described with reference to.
1710 1710 1710 1035 10 FIG. At, the method may include receiving, from the second UE via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources is non-overlapping with the set of time-frequency resources. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a DMRS componentas described with reference to.
1715 1715 1715 1040 10 FIG. At, the method may include performing the sidelink beam management procedure using the set of multiple sidelink reference signals, the set of multiple DMRSs, or both. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a beam management componentas described with reference to.
1720 1720 1720 1030 10 FIG. At, the method may include transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a sidelink message componentas described with reference to.
18 FIG. 1 11 FIGS.through 1800 1800 1800 shows a flowchart illustrating a methodthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with aspects of the present disclosure. The operations of the methodmay be implemented by a receive UE or its components as described herein. For example, the operations of the methodmay be performed by a receive UE as described with reference to. In some examples, a receive UE may execute a set of instructions to control the functional elements of the wireless receive UE to perform the described functions. Additionally, or alternatively, the wireless receive UE may perform aspects of the described functions using special-purpose hardware.
1805 1805 1805 1025 10 FIG. At, the method may include receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a sidelink reference signal componentas described with reference to.
1810 1810 1810 1035 10 FIG. At, the method may include receiving, from the second UE via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the second set of time-frequency resources at least partially overlaps the set of time-frequency resources. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a DMRS componentas described with reference to.
1815 1815 1815 1030 10 FIG. At, the method may include transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a sidelink message componentas described with reference to.
19 FIG. 1 7 12 15 FIGS.throughandthrough 1900 1900 1900 shows a flowchart illustrating a methodthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with aspects of the present disclosure. The operations of the methodmay be implemented by a transmit UE or its components as described herein. For example, the operations of the methodmay be performed by a transmit UE as described with reference to. In some examples, a transmit UE may execute a set of instructions to control the functional elements of the wireless transmit UE to perform the described functions. Additionally, or alternatively, the wireless transmit UE may perform aspects of the described functions using special-purpose hardware.
1905 1905 1905 1425 14 FIG. At, the method may include transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a configuration componentas described with reference to.
1910 1910 1910 1430 14 FIG. At, the method may include receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a feedback componentas described with reference to.
20 FIG. 1 7 12 15 FIGS.throughandthrough 2000 2000 2000 shows a flowchart illustrating a methodthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with aspects of the present disclosure. The operations of the methodmay be implemented by a transmit UE or its components as described herein. For example, the operations of the methodmay be performed by a transmit UE as described with reference to. In some examples, a transmit UE may execute a set of instructions to control the functional elements of the wireless transmit UE to perform the described functions. Additionally, or alternatively, the wireless transmit UE may perform aspects of the described functions using special-purpose hardware.
2005 2005 2005 1425 14 FIG. At, the method may include transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a configuration componentas described with reference to.
2010 2010 2010 1435 14 FIG. At, the method may include transmitting, using the set of multiple transmit beams and via a second set of time-frequency resources, a set of multiple DMRSs associated with a sidelink channel, where the set of multiple sidelink reference signals and a set of multiple sidelink channels associated with the set of multiple DMRSs are TDMed in a slot. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a DMRS resource componentas described with reference to.
2015 2015 2015 1430 14 FIG. At, the method may include receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a feedback componentas described with reference to.
21 FIG. 1 7 12 15 FIGS.throughandthrough 2100 2100 2100 shows a flowchart illustrating a methodthat supports sidelink beam management based on reference signal and sidelink channel transmissions in accordance with aspects of the present disclosure. The operations of the methodmay be implemented by a transmit UE or its components as described herein. For example, the operations of the methodmay be performed by a transmit UE as described with reference to. In some examples, a transmit UE may execute a set of instructions to control the functional elements of the wireless transmit UE to perform the described functions. Additionally, or alternatively, the wireless transmit UE may perform aspects of the described functions using special-purpose hardware.
2105 2105 2105 1425 14 FIG. At, the method may include transmitting, using a set of multiple transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a set of multiple sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a configuration componentas described with reference to.
2110 2110 2110 1435 14 FIG. At, the method may include transmitting, using the set of multiple transmit beams and via a second set of time-frequency resources, one or more DMRSs of a set of multiple DMRSs associated with a sidelink channel via a subset of a second set of time-frequency resources, where the subset overlaps the set of time-frequency resources. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a DMRS resource componentas described with reference to.
2115 2115 2115 1435 14 FIG. At, the method may include transmitting one or more DMRSs of the set of multiple DMRSs via a subset of the second set of time-frequency resources, where the subset overlaps the set of time-frequency resources. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a DMRS resource componentas described with reference to.
2120 2120 2120 1430 14 FIG. At, the method may include receiving, from the second UE, a sidelink message in response to the set of multiple sidelink reference signals, the sidelink message including feedback for the set of multiple sidelink reference signals, where the sidelink message indicates beam management information corresponding to the set of multiple sidelink reference signals based on the sidelink beam management configuration. The operations ofmay be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations ofmay be performed by a feedback componentas described with reference to.
Aspect 1: A method for wireless communications at a first UE, comprising: receiving, from a second UE via a set of time-frequency resources associated with a sidelink beam management configuration, a plurality of sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and the second UE in accordance with the sidelink beam management configuration; and transmitting, to the second UE and as part of the sidelink beam management procedure, a sidelink message in response to the plurality of sidelink reference signals, the sidelink message comprising feedback for the plurality of sidelink reference signals, wherein the sidelink message indicates beam management information corresponding to the plurality of sidelink reference signals based at least in part on the sidelink beam management configuration. Aspect 2: The method of aspect 1, further comprising: receiving, from the second UE via a second set of time-frequency resources, a plurality of DMRSs associated with a sidelink channel, wherein the second set of time-frequency resources is non-overlapping with the set of time-frequency resources. Aspect 3: The method of aspect 2, further comprising: performing the sidelink beam management procedure using the plurality of sidelink reference signals, the plurality of DMRSs, or both. Aspect 4: The method of any of aspects 2 through 3, further comprising: performing a received power measurement procedure for the plurality of sidelink reference signals, the plurality of DMRSs, or a combination thereof, wherein the sidelink message indicates one or more received power measurements associated with the received power measurement procedure. Aspect 5: The method of any of aspects 2 through 4, wherein the feedback indicates resources associated with a reference signal measurement that exceeds a measurement threshold. Aspect 6: The method of any of aspects 2 through 5, further comprising: performing a received power measurement procedure for the plurality of sidelink reference signals, the plurality of DMRSs, or a combination thereof; and initiating a BFR procedure based at least in part on a beam failure that is triggered based at least in part on one or more reference signal measurements and a measurement threshold. Aspect 7: The method of any of aspects 2 through 6, further comprising: decoding a plurality of sidelink channels associated with the plurality of DMRSs; and initiating a BFR procedure based at least in part on a beam failure that is triggered based at least in part on the decoding of the plurality of sidelink channels and an error threshold. Aspect 8: The method of any of aspects 2 through 7, wherein the plurality of sidelink reference signals and a plurality of sidelink channels associated with the plurality of DMRSs are TDMed in a slot. Aspect 9: The method of any of aspects 1 through 8, further comprising: receiving, from the second UE via a second set of time-frequency resources, a plurality of DMRSs associated with a sidelink channel, wherein the second set of time-frequency resources at least partially overlaps the set of time-frequency resources. Aspect 10: The method of aspect 9, wherein receiving the plurality of DMRSs comprises: receiving one or more DMRSs of the plurality of DMRSs via a subset of the second set of time-frequency resources, wherein the subset overlaps the set of time-frequency resources. Aspect 11: The method of any of aspects 9 through 10, wherein a time-frequency resource of the set of time-frequency resources is replaced with the sidelink channel associated with the plurality of DMRSs based at least in part on the sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the time-frequency resource. Aspect 12: The method of any of aspects 1 through 11, wherein the plurality of sidelink reference signals are received semi-persistently, aperiodically, or according to a periodicity based at least in part on the sidelink beam management configuration. Aspect 13: A method for wireless communications at a first UE, comprising: transmitting, using a plurality of transmit beams of the first UE and via a set of time-frequency resources associated with a sidelink beam management configuration of the first UE, a plurality of sidelink reference signals for a sidelink beam management procedure, the sidelink beam management procedure being between the first UE and a second UE in accordance with the sidelink beam management configuration; and receiving, from the second UE, a sidelink message in response to the plurality of sidelink reference signals, the sidelink message comprising feedback for the plurality of sidelink reference signals, wherein the sidelink message indicates beam management information corresponding to the plurality of sidelink reference signals based at least in part on the sidelink beam management configuration. Aspect 14: The method of aspect 13, further comprising: transmitting, using the plurality of transmit beams and via a second set of time-frequency resources, a plurality of DMRSs associated with a sidelink channel, wherein the second set of time-frequency resources is non-overlapping with the set of time-frequency resources. Aspect 15: The method of aspect 14, wherein the sidelink beam management procedure is based at least in part on the plurality of sidelink reference signals, the plurality of DMRSs, or both. Aspect 16: The method of any of aspects 14 through 15, wherein the feedback indicates a plurality of received power measurements associated with the plurality of transmit beams based at least in part on the plurality of sidelink reference signals, the plurality of DMRSs, or both. Aspect 17: The method of any of aspects 14 through 16, wherein the feedback indicates resources associated with at least one transmit beam of the plurality of transmit beams based at least in part on the plurality of sidelink reference signals, the plurality of DMRSs, or both. Aspect 18: The method of any of aspects 14 through 17, wherein the plurality of sidelink reference signals and a plurality of sidelink channels associated with the plurality of DMRSs are TDMed in a slot. Aspect 19: The method of any of aspects 13 through 18, further comprising: transmitting, using the plurality of transmit beams and via a second set of time-frequency resources, a plurality of DMRSs associated with a sidelink channel, wherein the second set of time-frequency resources at least partially overlap the set of time-frequency resources. Aspect 20: The method of aspect 19, wherein transmitting the plurality of DMRSs comprises: transmitting one or more DMRSs of the plurality of DMRSs via a subset of the second set of time-frequency resources, wherein the subset overlaps the set of time-frequency resources. Aspect 21: The method of any of aspects 19 through 20, wherein a time-frequency resource of the set of time-frequency resources is replaced with the sidelink channel associated with the plurality of DMRSs based at least in part on the sidelink channel being associated with a same transmit beam as a sidelink reference signal associated with the time-frequency resource. Aspect 22: The method of any of aspects 13 through 21, wherein the plurality of sidelink reference signals are transmitted semi-persistently, aperiodically, or according to a periodicity based at least in part on the sidelink beam management configuration. Aspect 23: A first UE for wireless communications, comprising one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to perform a method of any of aspects 1 through 12. Aspect 24: A first UE for wireless communications, comprising at least one means for performing a method of any of aspects 1 through 12. Aspect 25: A non-transitory computer-readable medium storing code for wireless communications at a first UE, the code comprising instructions executable by one or more processors to perform a method of any of aspects 1 through 12. Aspect 26: A first UE for wireless communications, comprising one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to perform a method of any of aspects 13 through 22. Aspect 27: A first UE for wireless communications, comprising at least one means for performing a method of any of aspects 13 through 22. Aspect 28: A non-transitory computer-readable medium storing code for wireless communications at a first UE, the code comprising instructions executable by one or more processors to perform a method of any of aspects 13 through 22. The following provides an overview of aspects of the present disclosure:
It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).
The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.
As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”
The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.
In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.
The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
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November 14, 2023
September 22, 2026
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